Email disappears in large groups from inbox.

Email disappears in large groups from inbox. The latest spanned from July 2017 - Mar 2019. Using Outlook. Have called in before with no explanations or restoration by Shaw. What is going on? I need those emails.

Thanks Tony. Emails only go to home pc...I receive many and don't want them to hog devices. Yes, I tried recovery but they were never in the "deleted" file.

A couple years ago I was on the phone with Shaw Tech support and a huge number of emails just evaporated as we spoke. The tech watched having access to my pc. The tech was shocked and had no solution. The one coincidence is it happens after Shaw notifies me of "close to limit". I reduce inbox. Then it appears Shaw just wipes out a vast amount . It is really difficult to hide a gap in my inbox that covers monthes/years?